12ASX2 datasheet(59/147 Pages) INFINEON

59 / 147 page

EiceDRIVER

™ SIL

1EDI2002AS

Protection and Diagnostics

Datasheet

Rev. 3.1, 2015-07-30

Hardware Description

From the conceptual point of view, the protection functions can be clustered into five main categories.

•

Category A corresponds to the functions where the device “decides on its own”, after the detection of an Event

Class A, to change the state of the output stage and to disable itself. A dedicated action from the user is needed

to reactivate the device (fast reactivation).

•

Category B corresponds to the functions where the device “decides on its own”, after the detection of an Event

Class B, to change the state of the output stage and to disable itself. A complete reinitialization from the user

is needed to reactivate the device (slow reactivation).

•

Category C corresponds to the functions that only issue a notification in case an error is detected.

•

Category D are intrusive supervision functions, aimed at being started when the application is not running.

•

Category E corresponds to implemented functions or capabilities supported by the device whose use can

enhance the overall safety coverage of the application.

Internal Clock

Supervision

Plausibility check of the frequency of the internal

oscillator.

DSee Chapter 3.5.9

DIO Supervision

Supervision of the DIO channel

See Chapter 3.5.10

TTOFF

Two Level Turn-Off

See Chapter 2.4.6

SPI Communication

SPI Communication (using register PRW).

See Chapter 4.1

Overvoltage robustness Robustness against transient overvoltage on power

supply.

ESee Chapter 5.2

Table 3-1

Safety Related Functions (cont’d)

Protection Feature

Description

Cate-

gory

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